Using Firefox 4.0b2 and latest (I think: v1.69.1) build of Lastpass in combination with YubiKey authentication.Everytime I restart Firefox, lastpass re-asks me to insert my YubiKey even though I keep checking the 'This is a trusted computer' checkbox.

Already tried removing / reinstalling the Lastpass plugin, restarting Firefox without checking the checkbox and using differend names for the computer.

Tried it on the latest stable Firefox and there it works fine, so it's a Firefox 4.0b2 issue.